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ESCAMOLUX 55-55 / 70-55 / 70-65 / 80-65 / 90-45 / 105-45
Wat gebeurt er bij verbranding van hout?
Verbrandingsproces.
Bij de verbranding van hout kunnen de volgende stappen worden onderscheiden:
Drogen:
De eerste stap is het drogen van de brandstof. Reeds bij lage temperatuur
(~ 100°C) zal het nog aanwezige vocht verdampen. Dit drogen impliceert een
aanzienlijk energieverlies indien te vochtig hout wordt verbrand. Een juiste
vochtigheid wordt bereikt na anderhalf tot twee jaar drogen (vochtgehalte 15-
17%).
Ontgassen:
Bij hogere temperaturen (150-350°C) treedt een ontgassingsstap op.
Hierbij wordt de chemische structuur van de brandstof afgebroken. Er
ontstaan vluchtige verbindingen zoals onder meer koolmonoxide (CO),
waterdamp (H
2
O), methaan (CH
4
). Daarnaast ontstaan vaak stoffen die
bij de ontledingstemperatuur vluchtig zijn, maar die bij lagere temperatuur
condenseren: de teerachtige componenten (dit product wordt ook wel creosoot
genoemd en zet zich bij een slechte stookwijze af in de schoorsteen en koude
delen van de kachel).
Verbranding van de ontgassingsproducten:
De vluchtige verbindingen verbranden in de gasfase onder toevoer van O
2
(lucht).
De ontstekingstemperatuur van de vluchtige verbindingen is ongeveer 550°C.
Verbranden van de vaste koolstof:
De vaste component die overblijft bestaat uit bijna zuivere koolstof, die bij ca.
800°C onder toevoer van O
2
(lucht) verbrandt.
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  • just had the chimney swept , cant remember which side the cut outs (45 % angles ) of the chimney plate should be looking up the chimney Submitted on 12-1-2021 at 13:26

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